I have a few steel tanks in one of my building to use. Their around 150-600 gallon tanks. My question is this: I wont to put a agi in side the tank with rubber wipers i guess? Also a hand crank for it or maybe run it from a 5-6hp deal.. I'm needing some tips on how to go about doing this. I have all the tools to do it with, but i have never tried something like this. So any tips on the parts i will need, the basic way to go about putting it together, and any other tips you wont to add that i might wont to try. P.S: I am not buying a new unit.. So if your post is only to say to buy new.. Then not wast your time posting. I will upgrade later, but just now moving to spry unit from old fashion way.. As for EWS please don't wast both our times with your none sense post here. I'm new to the forums, and your post already stand out.. Thanks to the ones who will post helpful info.